System Sensor 5601P 135 Degree Fixed Temperature Heat Detector

System Sensor 5600 Series #5601P Heat Detector 135 Degree Fixed Temperature

System Sensor 5601P 135 Degree Fixed Temperature Heat Detector

NEW UNUSED System Sensor 5601P Heat Detector 135 F 57c

System Sensor Heat Detector 5601P

System Sensor 5601P Mechanical Heat Detector, 5600 Series, 135F Fixed

System Sensor 5601P Heat Detector

System Sensor 5603 135°F Fixed Temp, Single-Circuit Mechanical Heat Detector